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Finding the Fourth Proportional to 69,429.60, 104,176.80 and 36,187.20

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Solution

The fourth proportional to 69,429.60, 104,176.80 and 36,187.20 is: 54,297.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,429.60 : 104,176.80 = 36,187.20 : x
  2. Step 2: Convert to fraction form
    69,429.60/104,176.80 = 36,187.20/x
  3. Step 3: Cross multiply
    69,429.60x = 104,176.80 × 36,187.20
  4. Step 4: Simplify right side
    69,429.60x = 3,769,866,696.96
  5. Step 5: Solve for x
    x = 3,769,866,696.96/69,429.60
  6. Step 6: Final answer
    x = 54,297.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.